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If you follow IBM's instructions to replace the batteries, you will not
affect the RAID.

Just DO NOT simply power down, replace the battery and IPL.

Darryl.

On Tue, Feb 16, 2021 at 4:44 AM Patrik Schindler <poc@xxxxxxxxxx> wrote:

Hello,

Am 16.02.2021 um 00:36 schrieb a4g atl <a4ginatl2@xxxxxxxxx>:

Its not usual to get failures so quick unless as I found if you shut
down and ipl it some time later. Older disks do not like the change in
temperature and I found that when shutting down systems in winter, the
drive cools more than expected and this results in drives failing.

I'm not sure if this is still a thing with disks built in the 2000s.

Another issue with RAID is the life of your CACHE battery. If you lose
your CACHE batteries, the RAID set is usually lost and requires a full
rebuild/restore.

Are you sure about this? Battery gone, RAID gone?

As far as I know, a battery unable to deliver power triggers the
controller to switch off write caching and nothing more.

:wq! PoC

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